Dead Pixel Test
Solid colours make a suspicious dot easier to see; they do not identify its cause by themselves. Use the checks below to distinguish a physical pixel defect from dust, a surface mark or rendered content.
Pixel warranty: verify the exact model
Updated ·Count bright points on black separately from dark points on white. A brand-wide replacement threshold cannot be determined without the exact model, country, seller and warranty document. Check the manufacturer’s official model policy and the seller’s return terms. An observation report is not a service decision or a legal eligibility assessment.
Before you start
Take a whole-panel image and a close-up that preserves the location. For a fixed point, record black, white and primary-colour backgrounds separately. For corner glow, keep distance, angle and display brightness unchanged. Lock exposure if the camera allows it: automatic night mode or HDR may change the appearance. Before-and-after photos with different camera or display settings are not a controlled comparison.
What to record
Name files with the date, test colour and setting profile. Record model, connection, resolution, Hz, brightness, room light, distance and repeat steps. Share whole-panel and close-up images together with support. Hide serial numbers, invoices and personal details in public posts. Photos do not guarantee warranty acceptance; explain the effect in ordinary films, games or work as well as on the test pattern.
Sources and scope
Related checks
Monitor test report
Check a new or used monitor in a repeatable order, collect your observations in one place and export a text file or use your browser's print dialog to create a PDF.
How to photograph a monitor defect for a useful support report
A monitor photo helps locate an observation; it is not an instrument reading of brightness, colour accuracy or permanent damage.